US4312823A - Method of manufacturing a plastic record carrier having a stratified structure - Google Patents

Method of manufacturing a plastic record carrier having a stratified structure Download PDF

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US4312823A
US4312823A US06/124,878 US12487880A US4312823A US 4312823 A US4312823 A US 4312823A US 12487880 A US12487880 A US 12487880A US 4312823 A US4312823 A US 4312823A
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United States
Prior art keywords
substrate
mold
resin
molding resin
layer
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Expired - Lifetime
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US06/124,878
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English (en)
Inventor
Hillebrand J. J. Kraakman
Egbert Broeksema
Sjoerd Nijboer
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US Philips Corp
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US Philips Corp
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
    • B29C43/021—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles characterised by the shape of the surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
    • B29C35/0888—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using transparant moulds
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B3/00—Recording by mechanical cutting, deforming or pressing, e.g. of grooves or pits; Reproducing by mechanical sensing; Record carriers therefor
    • G11B3/68—Record carriers
    • G11B3/70—Record carriers characterised by the selection of material or structure; Processes or apparatus specially adapted for manufacturing record carriers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
    • B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
    • B29C2035/0827—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using UV radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
    • B29C43/021—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles characterised by the shape of the surface
    • B29C2043/023—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles characterised by the shape of the surface having a plurality of grooves
    • B29C2043/025—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles characterised by the shape of the surface having a plurality of grooves forming a microstructure, i.e. fine patterning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2833/00—Use of polymers of unsaturated acids or derivatives thereof as mould material
    • B29K2833/04—Polymers of esters
    • B29K2833/12—Polymers of methacrylic acid esters, e.g. PMMA, i.e. polymethylmethacrylate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2017/00—Carriers for sound or information
    • B29L2017/001—Carriers of records containing fine grooves or impressions, e.g. disc records for needle playback, cylinder records
    • B29L2017/003—Records or discs
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S425/00—Plastic article or earthenware shaping or treating: apparatus
    • Y10S425/81—Sound record

Definitions

  • the invention relates to a method of manufacturing a plastic record carrier having a stratified structure in which a fluid molding resin is provided on a mold surface having an information track, a flexible substrate is provided on the layer of molding resin, the layer of resin is cured and the assembly of substrate and attached layer of cured resin is removed from the mold.
  • the information track present in the mold and impressed in the resin is as a rule in the form of a spiral or otherwise consists of concentric circles. Said information track is scanned rotationally symmetrically in which speeds of rotation of the record carrier in the order of 1500 rpm are realized. This relates to record carriers containing very refined video information, the so-called video discs.
  • the layer of resin with its information track has to be built up in the same manner as it is scanned and read afterwards in the reproduction apparatus, that is a rotationally symmetrical build-up.
  • the invention thus relates to a method of the kind mentioned in the preamble and is characterized in that the flexible substrate is vaulted spherosymmetrically, that is, deformed into a convex shape bulging toward the mold, and pressed against a relatively thick volume of the molding resin which is provided centrally on the mold, the molding resin thereby being rolled out over the mould surface with a circular fluid front and the vaulted substrate thereby being deformed to finally form a relatively thin plane surface, the molding resin being cured and the assembly of substrate with attached layer of cured resin being removed from the mold.
  • the substrate which has not yet been deformed entirely to form a plane surface, is uncoupled from the pressure force so that the substrate is relieved.
  • the substrate thereby pushes the fluid front towards the edge of the mold and engages the layer of resin without stress.
  • the resulting plastic record carrier after separation from the mold, also has the smoothness of the mold.
  • an entirely plane plastic record carrier can be obtained, provided the mold is plane.
  • the convex, spherosymmetrically vaulted substrate is pressed against the molding resin which has been deposited centrally on the mold in the form of a ring.
  • record carriers for example video discs, can be manufactured in which no layer of resin is present in the central portion. Said portion may be used, for example, for providing a label.
  • a spherosymmetrical substrate which has a central aperture, the diameter of the aperture corresponding to or being smaller than the inside diameter of the annular layer of resin deposited on the mold.
  • the aperture present in the resulting record carrier may serve to center the record carrier around a centering pin present in the reproduction apparatus.
  • the convex shape of the substrate by flexibly suspending or supporting a plane substrate, which is in the form of a circle or ring, along its whole circumference and then providing a gas pressure which is different on both sides of the substrate.
  • the difference in gas pressure is variable and also forms the force with which the spherosymmetrically vaulted substrate is pressed against the molding resin.
  • the conventionally used polymerizable molding resins for example the thermosetting urethane resin provided with a catalyst as stated in the above-mentioned Netherlands Patent Application No. 7,411,707, may be used.
  • a radiation-curable moulding resin is preferably used which is exposed via the substrate after having been rolled out completely over the mold.
  • Very suitable, radiation-curable molding resins are those which are described in U.S. application Ser. No. 774,973, filed Mar. 7, 1977, now abandoned in favor of U.S. application Ser. No. 887,188, filed Mar. 16, 1978, commonly assigned.
  • Such readily usable molding resins comprise low-molecular monomers and/or oligomers which contain on an average 25-70% by weight of saturated hydrocarbon groups and/or phenyl groups, are furthermore aprotic and have an average functionality as regards unsaturation which lies between the values 2 and 6.
  • Thin-liquid mixtures of low-molecular mono-, di-, tri- or tetra ester of acrylic acid are preferably used to which a photosensitive catalyst, for example an aromatic carbonyl compound, for example benzoin-isobutyl ether, has been added.
  • a photosensitive catalyst for example an aromatic carbonyl compound, for example benzoin-isobutyl ether
  • acrylic acid esters are 2-ethylhexylacrilate, ethylacrylate, phenylacrylate, 2-ethoxyethylacrylate and octadecylacrylate.
  • the mold used in the method according to the invention is preferably a mold of which at least the surface comprising the information track is manufactured from metal.
  • a very suitable mold is a mould manufactured from nickel as described, for example, in U.S. Pat. No. 3,894,179 in the name of Applicants.
  • the mold preferably has on its side remote from the information track a plane stiffening plate, for example, an aluminium plate having a thickness of 1 to 10 mm.
  • a plastic plate As a substrate a plastic plate is used having a thickness between 100 ⁇ m and 1.5 mm. When radiation-curable molding resins are used, the substrate should be previous to the radiation used, for example ultra-violet light.
  • Suitable plastics are, for example, polyvinylchloride, copolymeric vinylchloride vinyl acetate, polycarbonate polyester, polymethylmethacrylate and polystyrene.
  • the above mentioned molding resins readily adhere to the said substrates.
  • the adhesion may be improved by chemically roughening the substrate with, for example, chloroform or providing it with an adhesion-improving top layer.
  • plexiglass may be provided with a top layer of polyvinylchloride/acetate.
  • the invention also relates to a device for carrying out the method according to the invention which comprises a holder for the flexible substrate, which holder has a connection possibility for a pump, a support plate for the mold, as well as a source of power to move the holder or part of the holder relative to the support plate.
  • Such a device is known in itself from German Patent Specification No. 1,094,996, wherein a press for gramophone records is disclosed in which at least one of the two press molds is provided with a flexible diaphragm, the edge portion of which is clamped between the press mold and a pressure ring connected to the mold(s) by a screw joint.
  • the press mold has a pressure line through which liquid is pressed between the press mold and the diaphragm and consequently the diaphragm is deformed to become convex.
  • This known device is not suitable for carrying out the method according to the invention and has inter alia the drawback that the diaphragm cannot easily be removed from the press mold.
  • the flexible substrate has to be removed from the mold together with the cured layer of molding resin.
  • the substrate forms part of the record carrier so that a separate flexible substrate is needed for each plastic record carrier to be produced.
  • the diaphragm which does not form part of the record disc to be produced is permanently connected to the press mold and serves to expel the air present between the press mold and the disc to be pressed.
  • the invention provides a device of the above-mentioned kind which is particularly suitable for carrying out the method according to the invention and is characterized in that the holder comprises an elastically deformable cylindrical collar which at its annular end face remote from the holder comprises means to connect the substrate to the said collar along the circumference in a detachable and air-tight manner.
  • the substrate can be uncoupled from the holder in a very simple manner, namely by removing the sub-atmospheric pressure in the vacuum grooves.
  • cylindrical collar is closed by a flexible diaphragm on the side of the end face.
  • Said flexible diaphragm constitutes an extra support over the entire surface of a substrate held by vacuum pressure on the end face on the collar. This is of particular importance if a substrate having a central aperture is used in the device according to the invention.
  • the above-mentioned diaphragm comprises a central recessed portion and furthermore the mold comprises a central boss, the boss fitting in the recessed portion of the diaphragm.
  • the support plate with mold is situated entirely within the holder of the substrate, by placing the substrate in the holder an entirely closed system is obtained in which notably the molding resin provided on the mold is completely protected from ambient influences.
  • the collar at its end remote from the substrate comprises a projecting elastically deformable annular flange which at its free end is connected to a cylindrical jacket which at its end remote from the flange is closed by a bottom portion, the support plate with mold extends from the bottom portion into the space bounded by jacket, flange and collar, the mold being parallel to the substrate and the device comprising a connection possibility for connecting a vacuum pump, in which, by providing sub-atmospheric pressure in the space, the substrate is deformed so as to be spherosymmetrical and pressed against the mold under elastic deformation of collar and flange.
  • FIGS. 1-3 are cross-sectional views of a device or a part of the device for carrying out several stages of the method according to the invention
  • FIGS. 4 and 8 are cross-sectional views of a plastic record carrier manufactured by means of the method according to the invention.
  • FIGS. 5-7 are cross-sectional views of another embodiment of the device for carrying out various stages of the method according to the invention.
  • FIGS. 9-11 are cross-sectional views of still another embodiment of the device for carrying out various stages of the method of the invention.
  • Reference numeral 1 in FIG. 1 denotes a support plate for a nickel mold 2 of which the surface remote from the support plate 1 comprises a spiral-like information track.
  • a quantity 3 of a UV-curable molding resin on the basis of an acrylin acid ester.
  • the support plate 1 is placed on table 5 by means of adjusting pins 4. The positions of the support plate 1 relative to the table 5 can be adjusted by means of the adjusting pins.
  • Table 5 comprises a column 6 which has an arm 7.
  • a linear motor 8 is secured to arm 7 and has a shaft 9 which can be moved in the directions shown by means of the motor 8.
  • Shaft 9 comprises on its side remote from the motor a holder 10 for a flexible substrate 11.
  • Holder 10 comprises a cylindrical collar 12 manufactured from deformable material, for example rubber, which, at its end face remote from the holder 10, has an annular suction cup 13.
  • Collar 12 has a perforation 14 which at one end extends into the suction cup 13 and at the other end passes through the holder 10 connected to the collar 12. Via the perforation a sub-atmospheric pressure can be provided in the suction cup 13 by means of a vacuum pump, not shown, as a result of which the flexible circular substrate plate 11 which is manufactured from a material which passes UV light, for example plexiglass, is drawn against the collar 12 via the suction cup 13.
  • Holder 10 has a second perforation 15 extending into the space 16 which is bounded by holder 10, collar 12 and substrate 11 and which otherwise is airtight.
  • An elevated pressure is realized in space 16 via perforation 15 which can be made to communicate with a pressure pump, not shown.
  • the flexible substrate 11 will be vaulted or deformed into a convex, rounded shape with simultaneous elastic deformation of collar 12 with suction cup 13.
  • the assembly of holder 10 with collar 12, suction cup 13, and convex substrate 11 drawn thereon is moved by the motor 8 in the direction of the support plate 1 with mold 2 and molding resin 3 present below the substrate 11.
  • the central portion of the convex substrate 11 will contact the molding resin 3 first.
  • the molding resin will be rolled by the vaulted substrate over the mold 2, the moulding resin spreading over the mold with a circular fluid front and the convex substrate being simultaneously deformed, that is flattened.
  • FIG. 2 shows the situation in which the molding resin is spread partly over the surface of the mold.
  • the reference numerals used in FIG. 2 correspond to those of FIG. 1.
  • the substrate 11 When the substrate 11 has been deformed substantially entirely to form a plane surface and the fluid front has nearly reached the edge of the mold, the substrate 11 is uncoupled from collar 12 with suction cup 13 in that air is admitted to the suction cup 13 via perforation 14 so that the applied sub-atmospheric pressure is removed.
  • the substrate 11 Upon uncoupling, the substrate 11, as a result of its natural stress relief, will engage entirely flatly against the surface of the mold and push the fluid front of the resin 3 up to the edge of the mold.
  • the layer of molding resin Via the substrate 11 which engages the molding resin 3 without stress, the layer of molding resin is cured by exposure to ultraviolet light originating from light source 17 (FIG. 3), for example ultra-violet light of 350 mm originating from a 500 watt water-cooled high pressure mercury lamp.
  • the exposure time depends, for example, on the thickness of the layer of molding resin which may vary from 0.2 to 300 ⁇ m but is preferably 1-75 ⁇ m, on the composition of the molding resin, on the light intensity and on the thickness of the substrate which as a rule is from 1-3 mm. Generally the exposure time will vary from a few seconds to a few minutes.
  • FIG. 4 shows the plastic record carrier which consists of the cured layer of molding resin 18 having an information pattern and the substrate plate 11 bonded thereto.
  • the plastic record carrier is provided on the side of the layer of molding resin comprising the information with a 300 A thick Al layer (not shown in FIG. 4) which is vapor-deposited in a vacuum bell at a pressure of 10 -4 to 10 -5 Torr.
  • a protective lacquer layer (not shown in FIG. 4) is provided on the Al layer by pouring nitrocellulose lacquer on the Al layer and centrifuging the assembly, the nitrocellulose lacquer spreading as a thin layer over the Al layer.
  • Reference numeral 19 in FIG. 5 denotes a support plate for a nickel mold 20 which has a central pin 21.
  • An annular quantity 22 of a UV-curable molding resin is provided on the metal mold 20 around the pin 21.
  • Support plate 19 is secured to table 24 in an adjustable manner by means of adjusting pins 23, the table comprising a column 25 with support arm 26.
  • a linear motor 27 having a movable shaft 28 is secured to support arm 26. At its end remote from the motor 27 the movable shaft 28 is connected to a holder 29 for the flexible substrate 30.
  • Holder 29 has a flexible cylindrical collar 31 which, at its end remote from the holder, has a flared portion 32 in which a vacuum duct 33 is provided.
  • collar 31 At its end remote from the holder 29, collar 31 is closed by a flexible diaphragm 34 which is mainly circular and has a central recessed portion 35. In this manner, an air-tight space 39 is formed between holder 29, holder 31 and diaphragm 34, in which space an excessive gas pressure can be provided by suitable means, for example a pressure pump, which are not shown in the Figure, via a perforation 36.
  • Holder 29 comprises a second perforation 37 extending through collar 31 into vacuum duct 33. By communicating holder 29 with a vacuum pump not shown, a sub-atmospheric pressure can be produced in duct 33 via perforation 37.
  • the flexible substrate 30 which has a central aperture 38 the dimension of which corresponds to the inside dimension of the central recessed portion 35 of diaphragm 34, will engage the non-recessed portion of diaphragm 34.
  • the substrate 30 is manufactured from UV-passing plastics, for example polymethylmethacrylate (Plexiglass).
  • the operation of the device is as follows.
  • the molding resin 22 When the holder 29 with diaphragm 34 and substrate 30 is further lowered, the molding resin 22 will be rolled over mould 20 by means of the vaulted substrate 30 and spread over the surface of mold 20 with a circular fluid front. Deformation, that is flattening of the convex diaphragm 34 and substate 30, will take place while furthermore pin 21 extends via aperture 38 of substrate 30 in recessed portion 35 of diaphragm 34.
  • FIG. 6 shows the situation in which the molding resin 22 is partly spread over the surface of the mold.
  • the reference numerals used in FIG. 6 correspond to those of FIG. 5.
  • the molding resin 22 is cured with UV-light from light sources 40 via substrate 30 (FIG. 7).
  • the exposure is carried out in the same manner as described with reference to FIG. 3.
  • the support plate, the mold and the substrate preferably have the same outside diameters so that the excess of molding resin after curing can easily be cut away without damaging the layer of resin between mold and substrate.
  • FIG. 8 shows the resulting plastic information carrier in which substrate 30 is bonded to the cured layer of molding resin 42 which has an information pattern 41.
  • the plastic record carrier has a central aperture 43.
  • Reference numeral 44 in FIG. 9 denotes a holder for substrate 45.
  • the holder comprises a circular bottom potion 46 which is connected at its edge to an upright cylindrical jacket 47. At its end remote from bottom portion 46 jacket 47 has an inwardly directed flange 48 which in turn comprises at its free end an upright collar 49. At its end face the collar 49 has an annular vacuum duct 50 in which a sub-atmospheric pressure can be provided via perforation 51 and by means of the vacuum pump not shown. The perforation extends from the vacuum duct 50 axially through collar 49, then radially through flange 48 and jacket 47 and opens into the outer surface of jacket 47.
  • a sub-atmospheric pressure is provided in space 52 via perforation 57.
  • the substrate 45 which is drawn against collar 49 will be deformed into a convex shape, with simultaneous elastic deformation of collar 49.
  • the central portion of substrate 45 will contact the molding resin 56 present centrally on mould 54 and the substrate 45, when the sub-atmospheric pressure is increased, will then roll the molding resin over the surface of mold 54 with a circular fluid front.
  • FIG. 10 shows the situation in which the substrate 45 has spread the molding resin 55 over a part of mold 54.
  • FIG. 11 shows the situation in which no further movement of substrate 45, collar 39 and flange 48 takes place any longer.
  • the substrate 45 has been fully flattened and bears against the molding resin 56 which is spread over the whole mold surface.
  • the layer of molding resin 56 is exposed to ultra-violet light from light sources 58 and is cured.
  • the sub-atmospheric pressure in space 52 flange 48 and collar 49 will gradually return elastically to the original position in which the substrate 45 with the cured layer of molding resin 56 bonded thereto is released from the mold surface.
  • the sub-atmospheric pressure in duct 50 is removed and the resulting plastic record carrier can be removed from the holder 54.
  • the resulting record carrier may be provided with a reflecting layer and a protective lacquer.

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  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Physics & Mathematics (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Thermal Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Manufacturing Optical Record Carriers (AREA)
  • Moulding By Coating Moulds (AREA)
  • Molding Of Porous Articles (AREA)
US06/124,878 1977-03-14 1980-02-26 Method of manufacturing a plastic record carrier having a stratified structure Expired - Lifetime US4312823A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NLAANVRAGE7702702,A NL177721B (nl) 1977-03-14 1977-03-14 Werkwijze voor het vervaardigen van een kunststofinformatiedrager met gelaagde structuur alsmede een inrichting voor het uitvoeren van de werkwijze.
NL7702702 1977-03-14

Related Parent Applications (1)

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US05949918 Continuation 1978-10-10

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US4312823A true US4312823A (en) 1982-01-26

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US06/124,878 Expired - Lifetime US4312823A (en) 1977-03-14 1980-02-26 Method of manufacturing a plastic record carrier having a stratified structure

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US (1) US4312823A (enrdf_load_stackoverflow)
JP (1) JPS53116105A (enrdf_load_stackoverflow)
AT (1) AT357798B (enrdf_load_stackoverflow)
AU (1) AU522151B2 (enrdf_load_stackoverflow)
CA (1) CA1106560A (enrdf_load_stackoverflow)
DE (1) DE2809161C3 (enrdf_load_stackoverflow)
ES (1) ES467783A1 (enrdf_load_stackoverflow)
FR (1) FR2384404A1 (enrdf_load_stackoverflow)
GB (1) GB1581511A (enrdf_load_stackoverflow)
IT (1) IT1093215B (enrdf_load_stackoverflow)
NL (1) NL177721B (enrdf_load_stackoverflow)

Cited By (39)

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US4395211A (en) * 1979-08-10 1983-07-26 U.S. Philips Corporation Method and device for manufacturing a plastic record carrier
US4447201A (en) * 1981-06-29 1984-05-08 Clean-Tex A/S Vulcanizing press for vulcanizing flat articles
US4449916A (en) * 1980-11-20 1984-05-22 Matsushita Electric Industrial Co., Ltd. Device for manufacturing information recording mediums
US4472124A (en) * 1980-09-05 1984-09-18 Matsushita Electric Industrial Co., Limited Device for producing an information recording disk
US4477328A (en) * 1979-05-25 1984-10-16 U.S. Philips Corporation Optically readable information disk and method of manufacturing same
US4500486A (en) * 1981-10-06 1985-02-19 Thomson-Csf Method for removal of a data carrier disk after molding
US4543225A (en) * 1984-07-05 1985-09-24 Docdata N.V. Method and system for reproducing relief structures onto a substrate
US4560339A (en) * 1983-11-15 1985-12-24 Officine Meccaniche Veronesi Spa (O.M.V.) Extracting system for fabricated objects formed by a thermo-forming machine
US4569806A (en) * 1983-02-04 1986-02-11 U.S. Philips Corporation Method and device for manufacturing an information carrier of a synthetic material having a laminated structure
US4670077A (en) * 1985-04-19 1987-06-02 Optical Storage International-Holland Method of providing a substrate with an optically readable information disc
US5078947A (en) * 1988-09-30 1992-01-07 Victor Company Of Japan, Ltd. Method and apparatus for the fabrication of optical record media such as a digital audio disc
US5242629A (en) * 1990-11-19 1993-09-07 U.S. Philips Corporation Method of manufacturing an optically readable disc
US5284435A (en) * 1991-02-28 1994-02-08 U.S. Philips Corporation Apparatus for manufacturing a disc-shaped information carrier
US5427599A (en) * 1987-06-09 1995-06-27 International Business Machines Corporation System for stamping an optical storage disk
US5857358A (en) * 1996-10-23 1999-01-12 Donnelly Corporation Method and apparatus for bending glass
US5938810A (en) * 1996-10-23 1999-08-17 Donnelly Corporation Apparatus for tempering and bending glass
WO2003018310A1 (en) * 2001-08-22 2003-03-06 Taltos S.R.L. Method of manufacturing a composite stone-glass panel, and panel obtained by such method
US20040145086A1 (en) * 2001-05-22 2004-07-29 Atsushi Yusa Injection molding method
WO2005120819A1 (de) * 2004-06-11 2005-12-22 Maschinenfabrik Lauffer Gmbh & Co. Kg Presse, insbesondere laminierpresse
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US20070018362A1 (en) * 2003-12-05 2007-01-25 Babak Heidari Device and method for large area lithography
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US20070105384A1 (en) * 2003-07-10 2007-05-10 Mccutcheon Jeremy Automated process and apparatus for planarization of topographical surfaces
US8147235B2 (en) * 2003-12-05 2012-04-03 Obducat Ab Device and method for large area lithography
US20070018362A1 (en) * 2003-12-05 2007-01-25 Babak Heidari Device and method for large area lithography
US8393885B2 (en) * 2004-03-29 2013-03-12 Canon Kabushiki Kaisha Processing apparatus
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US7972553B2 (en) 2004-05-07 2011-07-05 Obducat Ab Method for imprint lithography at constant temperature
US7997890B2 (en) 2004-05-07 2011-08-16 Obducat Ab Device and method for lithography
WO2005120819A1 (de) * 2004-06-11 2005-12-22 Maschinenfabrik Lauffer Gmbh & Co. Kg Presse, insbesondere laminierpresse
US20100314803A1 (en) * 2005-01-31 2010-12-16 Molecular Imprints, Inc. Chucking System for Nano-Manufacturing
US7947325B2 (en) 2005-03-01 2011-05-24 Ricoh Company, Ltd. Methods for manufacturing flexible transfer body and flexible optical disc and flexible optical disc manufactured thereby
USRE47483E1 (en) 2006-05-11 2019-07-02 Molecular Imprints, Inc. Template having a varying thickness to facilitate expelling a gas positioned between a substrate and the template
US8215946B2 (en) 2006-05-18 2012-07-10 Molecular Imprints, Inc. Imprint lithography system and method
US20080084006A1 (en) * 2006-10-10 2008-04-10 Jun Gao Hydraulic-facilitated contact lithography apparatus, system and method
US7830498B2 (en) * 2006-10-10 2010-11-09 Hewlett-Packard Development Company, L.P. Hydraulic-facilitated contact lithography apparatus, system and method
US9573300B2 (en) 2007-09-28 2017-02-21 Toray Industries, Inc. Method and device for manufacturing sheet having fine shape transferred thereon
US20100289182A1 (en) * 2007-09-28 2010-11-18 Yuma Hirai method and device for manufacturing sheet having fine shape transferred thereon
US8814556B2 (en) * 2007-09-28 2014-08-26 Toray Industries, Inc Method and device for manufacturing sheet having fine shape transferred thereon
US20100255139A1 (en) * 2009-04-03 2010-10-07 Ryuta Washiya Micropattern transfer stamper and micropattern transfer device
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CN102446809A (zh) * 2010-10-12 2012-05-09 S.O.I.Tec绝缘体上硅技术公司 用于分子键合硅衬底和玻璃衬底的方法
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US10611078B2 (en) * 2016-04-12 2020-04-07 Iai Industrial Systems B.V. Method and apparatus for applying a layer having a relief on a flat face of a substrate
CN107322854A (zh) * 2017-07-13 2017-11-07 上海航天控制技术研究所 一种磁码盘霍尔器件及其制备方法和灌胶模具
CN107322854B (zh) * 2017-07-13 2020-01-03 上海航天控制技术研究所 一种磁码盘霍尔器件及其制备方法和灌胶模具
US20210402659A1 (en) * 2018-11-26 2021-12-30 Edge Embossing, Inc. Thermoplastic forming tools, assemblages thereof, and methods of making and methods of use thereof
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FR2384404B1 (enrdf_load_stackoverflow) 1984-05-18
IT7821103A0 (it) 1978-03-10
AT357798B (de) 1980-07-25
GB1581511A (en) 1980-12-17
NL7702702A (nl) 1978-09-18
FR2384404A1 (fr) 1978-10-13
JPS53116105A (en) 1978-10-11
ATA177878A (de) 1979-12-15
DE2809161C3 (de) 1985-11-21
IT1093215B (it) 1985-07-19
NL177721B (nl) 1985-06-03
DE2809161A1 (de) 1978-09-21
AU3407178A (en) 1979-09-13
ES467783A1 (es) 1978-10-16
JPS618762B2 (enrdf_load_stackoverflow) 1986-03-17
DE2809161B2 (enrdf_load_stackoverflow) 1980-07-10
CA1106560A (en) 1981-08-11
AU522151B2 (en) 1982-05-20

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